mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-25 02:57:19 +00:00
102 lines
3.0 KiB
JavaScript
Executable File
102 lines
3.0 KiB
JavaScript
Executable File
/*\
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title: $:/core/modules/widgets/tiddler.js
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type: application/javascript
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module-type: widget
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Tiddler widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var TiddlerWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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TiddlerWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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TiddlerWidget.prototype.render = function(parent,nextSibling) {
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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this.renderChildren(parent,nextSibling);
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};
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/*
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Compute the internal state of the widget
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*/
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TiddlerWidget.prototype.execute = function() {
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this.tiddlerState = this.computeTiddlerState();
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this.setVariable("currentTiddler",this.tiddlerState.currentTiddler);
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this.setVariable("missingTiddlerClass",this.tiddlerState.missingTiddlerClass);
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this.setVariable("shadowTiddlerClass",this.tiddlerState.shadowTiddlerClass);
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this.setVariable("systemTiddlerClass",this.tiddlerState.systemTiddlerClass);
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this.setVariable("tiddlerTagClasses",this.tiddlerState.tiddlerTagClasses);
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// Construct the child widgets
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this.makeChildWidgets();
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};
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/*
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Compute the tiddler state flags
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*/
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TiddlerWidget.prototype.computeTiddlerState = function() {
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// Get our parameters
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this.tiddlerTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
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// Compute the state
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var state = {
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currentTiddler: this.tiddlerTitle || "",
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missingTiddlerClass: (this.wiki.tiddlerExists(this.tiddlerTitle) || this.wiki.isShadowTiddler(this.tiddlerTitle)) ? "tc-tiddler-exists" : "tc-tiddler-missing",
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shadowTiddlerClass: this.wiki.isShadowTiddler(this.tiddlerTitle) ? "tc-tiddler-shadow" : "",
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systemTiddlerClass: this.wiki.isSystemTiddler(this.tiddlerTitle) ? "tc-tiddler-system" : "",
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tiddlerTagClasses: this.getTagClasses()
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};
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// Compute a simple hash to make it easier to detect changes
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state.hash = state.currentTiddler + state.missingTiddlerClass + state.shadowTiddlerClass + state.systemTiddlerClass + state.tiddlerTagClasses;
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return state;
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};
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/*
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Create a string of CSS classes derived from the tags of the current tiddler
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*/
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TiddlerWidget.prototype.getTagClasses = function() {
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var tiddler = this.wiki.getTiddler(this.tiddlerTitle);
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if(tiddler) {
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var tags = [];
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$tw.utils.each(tiddler.fields.tags,function(tag) {
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tags.push("tc-tagged-" + encodeURIComponent(tag));
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});
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return tags.join(" ");
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} else {
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return "";
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}
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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TiddlerWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes(),
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newTiddlerState = this.computeTiddlerState();
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if(changedAttributes.tiddler || newTiddlerState.hash !== this.tiddlerState.hash) {
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this.refreshSelf();
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return true;
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} else {
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return this.refreshChildren(changedTiddlers);
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}
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};
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exports.tiddler = TiddlerWidget;
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})();
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